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Welcome to Oracle 1Z0-083 practice test online
QUESTION 1
You are managing this configuration:
1.
CDB1 is a container database.
2.
PDB1 and PDB2 are two pluggable databases in CDB1.
3.
USER1.EMP is a table in PDB1 and USER2.DEPT is a table in PDB2. CDB1 user SYS executes these commands
after connecting successfully to PDB2:
Which two are true? (Choose two.)
A. The inserts on USER1.EMP remain uncommitted when the session connected to PDB2.
B. The inserts on USER1.EMP were committed when the session inserted a row into USER2.DEPT.
C. The insert on USER2.DEPT fails because of the active transaction in the parent container.
D. The insert on USER2.DEPT is a recursive autonomous transaction by the child session and is committed.
E. The inserts on USER1.EMP were rolled back when the session connected to PDB2.
F. The insert on USER2.DEPT is uncommitted.
G. The inserts on USER1.EMP were committed when the session connected to PDB2.
Correct Answer: DE
QUESTION 2
Which three are true about Automatic Workload Repository (AWR)? (Choose three.)
A. By default, AWR snapshots are taken every 60 minutes.
B. Its collection level is determined by the value of the STATISTICS_LEVEL database parameter.
C. By default, AWR snapshots are retained for 7 days.
D. The taking of AWR snapshots can be disabled.
E. AWR data is stored in the SYSTEM tablespace.
Correct Answer: ABD
Reference: https://docs.oracle.com/cd/B28359_01/server.111/b28320/initparams240.htm#REFRN10214
QUESTION 3
Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)
A. The number of table rows is considered when evaluating the cost of accessing a table using an index.
B. Index balanced B*Tree height is considered when evaluating the cost of using an index.
C. The Statistics Advisor can help recommend the best way to gather statistics.
D. Statistics collected using DBMS_STATS always yield the best optimizer result.
E. The Statistics Advisor generates actions for all recommendations.
Correct Answer: CD
Reference: https://docs.oracle.com/en/database/oracle/oracle-database/19/tgsql/optimizer-statistics-advisor.html#GUIDD81A7708-FDA0-45BB-A6E2-103858B047AE
QUESTION 4
Examine this configuration:
1.
CDB1 is an Oracle Database 12c Release 2 database containing pluggable databases PDB$SEED, PDB1, and PDB2.
2.
PDB$SEED is open READ ONLY
3.
PDB1 is open READ WRITE
4.
PDB2 is MOUNTED.
5.
ORACLE_HOME is /u01/app/oracle/product/18.1.0/dbhome_1.
You execute these commands before upgrading the database to the current release:
For which databases will fixup scripts be created?
A. CDB1, PDB$SEED, PDB1, and PDB2
B. PDB$SEED, PDB1, and PDB2 only
C. CDB1 and PDB$SEED only
D. CDB1, PDB1, and PDB2 only
E. CDB1, PDB$SEED, and PDB1 only
Correct Answer: E
QUESTION 5
Which two are true about server-generated alerts? (Choose two.)
A. Stateful alerts must be created by a DBA after resolving the problem.
B. Stateless alerts can be purged manually from the alert history.
C. Stateless alerts can be cleared manually.
D. Stateless alerts are automatically cleared.
E. Stateful alerts are purged automatically from the alert history.
Correct Answer: AC
Reference: https://jameshuangsj.wordpress.com/2019/12/01/clears-stateless-alerts-in-oem-by-using-emcli/
QUESTION 6
Examine this configuration:
1.
CDB1 is a container database.
2.
PDB1 and PDB2 are pluggable databases in CDB1.
3.
PDB1 and PDB2 are OPEN in READ WRITE mode.
You execute these commands successfully:
Which two are true? (Choose two.)
A. Uncommitted transactions in PDB1 have been rolled back.
B. PDB1 is closed.
C. Uncommitted transactions in CDB1 and PDB1 have been rolled back.
D. CDB1 is shut down.
E. CDB1 is in MOUNT state
Correct Answer: BE
QUESTION 7
Which three can be done using Oracle Database Configuration Assistant (DBCA) starting from Oracle Database 19c?
(Choose three.)
A. cloning a remote container database in interactive mode
B. cloning a remote pluggable database in silent mode
C. relocating a remote pluggable database in interactive mode
D. relocating a remote container database in silent mode
E. cloning a remote container database in silent mode
F. relocating a remote pluggable database in silent mode
G. relocating a remote container database in interactive mode
Correct Answer: CEF
Reference: https://docs.oracle.com/en/database/oracle/oracle-database/19/clone-pdbs-using-dbca-silent-mode/index.html?learningpath=trueandappuser=nobodyandappsession=170971049395andcontentid=26693andactivityname=Clone%
20PDBs% 20using%20DBCA%20in%20Silent%20Modeandeventid=6352
QUESTION 8
Which two are true about RMAN backups when using a media manager to write backups to tape when there are only
two tape drives? (Choose two.)
A. SBT tape compression can be used even if no RMAN compression is configured.
B. Any backup set written to the SBT device in this configuration can contain a maximum of two backup pieces.
C. Any backup written to the SBT device in this configuration can contain a maximum of two backup sets.
D. SBT tape compression and RMAN backup compression should be used in parallel.
E. The SBT device should be configured to use PARALLELISM 2 to allow both tape drive to be used simultaneously.
Correct Answer: DE
QUESTION 9
Which two are true about the Oracle dataabse methodology? (Choose two.)
A. The Oracle Database time model should be used to find the database and instance areas most in need of tuning.
B. Tuning activities should stop once the user is satisfied with performance.
C. Tuning activities should stop once agreed service levels for performance have been met.
D. The database instance memory should always be tuned before tuning any file systems.
E. SQL statements should always be tuned before tuning any file systems.
F. The alert log should be used to find the database and instance areas most in need of tuning.
Correct Answer: CF
Reference: https://flylib.com/books/en/4.322.1.9/1/
QUESTION 10
You must transport the UNIVERSITY tablespace from one database to another.
The UNIVERSITY tablespace is currently open read/write.
The source and destination platforms have different endian formats.
Examine this list of actions:
1.
Make the UNIVERSITY tablespace read-only on the source system.
2.
Export the UNIVERSITY tablespace metadata using EXPDP.
3.
Convert the UNIVERSITY tablespace data fies to the destination platform format using RMAN on the source system.
4.
Copy the UNIVERSITY tablespace data files to the destination system.
5.
Copy the Data Pump dump set to the destination system.
6.
Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the destination
system.
7.
Import the UNIVERSITY tablespace metadata using IMPDP.
8.
Make the UNIVERSITY tablespace read/write on the destination system.
Which is the minimum number of actions required, in the correct order, to transport the UNIVERSITY tablespace?
A. 1, 2, 4, 5, 7, 8
B. 1, 2, 4, 6, 7, 8
C. 1, 2, 3, 4, 5, 7, 8
D. 1, 2, 3, 4, 5, 6, 7, 8
E. 2, 4, 5, 6, 7
Correct Answer: B
QUESTION 11
Examine the command for creating pluggable database PDB2 in container database CDB2.
Select three options, any one of which is required for it to execute successfully. (Choose three.)
A. Add the FILE_NAME_CONVERT clause to the statement and set the PDB_FILE_NAME_CONVERT parameter.
B. Add only the CREATE_FILE_DEST clause to the statement.
C. Set only the PDB_FILE_NAME_CONVERT parameter.
D. Set the PDB_FILE_NAME_CONVERT parameter and enable OMF.
E. Enable only OMF.
F. Add the FILE_NAME_CONVERT clause to the statement and enable Oracle Managed Files (OMF)
Correct Answer: BDE
QUESTION 12
A user complains about poor database performance.
You want to verify if the user\\’s session has waited for certain types of I/O activity.
Which view displays all waits waited on by a session at least once?
A. V$SESSION_EVENT
B. V$SESSTAT
C. V$SESSION_WAIT
D. V$SESSION_WAIT_CLASS
E. V$SESSION
Correct Answer: D
Reference: https://docs.oracle.com/cd/E29597_01/server.1111/e16638/instance_tune.htm
QUESTION 13
Examine this configuration:
1.
CDB1 is a container database.
2.
COMMON_USER_PREFIX is C##.
3.
PDB1 is a pluggable database contained in CDB1.
4.
APP1_ROOT is an application container contained in CDB1.
5.
APP1_PDB1 is an application PDB contained in APP1_ROOT.
You execute these commands successfully:
Which two are true? (Choose two.)
A. APP1_USER1 can be created in PDB1.
B. APP1_USER1 can be created in CDB1.
C. APP1_USER1 can have different privileges in each Application PDB contained in APP1_ROOT.
D. C##_APP_USER1 can be created in CDB1.
E. P1_USER1 can be created in CDB1.
F. C##_USER1 will have the same privileges and roles granted in all PDBs in CDB1.
Correct Answer: CF
to sum up:
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